671622216887 has 2 divisors, whose sum is σ = 671622216888. Its totient is φ = 671622216886.

The previous prime is 671622216857. The next prime is 671622216911. The reversal of 671622216887 is 788612226176.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 671622216887 - 2¹² = 671622212791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671622216817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335811108443 + 335811108444.

It is an arithmetic number, because the mean of its divisors is an integer number (335811108444).

Almost surely, 2^671622216887 is an apocalyptic number.

671622216887 is a deficient number, since it is larger than the sum of its proper divisors (1).

671622216887 is an equidigital number, since it uses as much as digits as its factorization.

671622216887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5419008, while the sum is 56.

The spelling of 671622216887 in words is "six hundred seventy-one billion, six hundred twenty-two million, two hundred sixteen thousand, eight hundred eighty-seven".